Question Text
Question 1 :
Cathode rays are passing through a discharge tube. In the tube, there is
Question 2 :
What change is noticed  in cathode ray tube when  the anode voltage is increased ?
Question 3 :
Why is the screen of the cathode ray tube coated ? Name the material used for coating.
Question 4 :
Which of the following statement hold true w.r.t. thomsons model atom
Question 5 :
What is the purpose of filament in electron gun inside a cathode ray tube?
Question 6 :
Assertion: Neutrons penetrate matter more readily as compared to protons.
Reason: Neutrons are slightly more massive than protons.
Question 7 :
Photons have the following characteristics:<br>(i) energy of a photon $E=h\gamma$<br>(ii) photons travel with the velocity of light<br>(iii) photons are emitted when light of frequency $\gamma$ is emitted by an atom
Question 8 :
The time taken by a photo-electron to come out after the photon strikes is approximately<br/>
Question 9 :
The time by a photo-electron to come out after the photon strikes is approximately 
Question 10 :
The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Which of the following is its kinetic energy in the first excited state?
Question 11 :
What will be the velocity of the electron when it just reaches the positive plate?<br>